Hi, I´m working with the SFR02 Ultrasonic Range Finder (Devantech). And is given me one real measurement and then repeat 16 cm fake measurement four or five times, and then another real measurement. So this fake measurement doesn´t allow me to get a continous real mesurement.

Rob, Thanks for the reply. I re checked the datasheet, the complete measurement cycle is 65ms, and recommends 70 ms delay between readings. Also said that the SFR02 doesn´t response to any command on the I2C bus whilst it is ranging, so I have no clue by is getting this 16cm false measurement.